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Cisco SD-WAN's URL Encoding Bypass Grants Unauthenticated Admin Access. Federal ...
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Fusion42 · 3 October 2026 · Fusion42 review
A critical authentication bypass vulnerability in Cisco Catalyst SD-WAN Manager allows unauthenticated remote attackers to gain administrative access via URL encoding manipulation. Federal agencies have been mandated by CISA to patch the flaw by October 3, 2026, amid ongoing active exploitation and no effective workarounds.
This Wire brief sits within Fusion42's coverage of Telecom & Connectivity.
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The federal mandate to patch Cisco SD-WAN access flaws confirms network management security as a top priority for telecom providers. You must accelerate patching immediately or risk catastrophic control loss over thousands of devices.
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1 source · 3 Oct 2026
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